cli/command/container: don't set CopyToContainerOptions.AllowOverwriteDirWithFile

The `AllowOverwriteDirWithFile` option was added when reimplementing the
CLI using the API Client lib in [moby@1b2b91b]. Before that refactor, the
`noOverwriteDirNonDir` query argument [would be set unconditionally][1]
by the CLI, with no options to control the behavior.

It's unclear why the `noOverwriteDirNonDir` was implemented as opt-in (not
opt-out), as overwriting a file with a directory (or vice-versa) would
generally be unexpected behavior.

We're considering making `noOverwriteDirNonDir` unconditional on the daemon
side, and to deprecate the `AllowOverwriteDirWithFile` option. This patch
removes its use, as it was set to the default either way, and there's no
options to configure it from the CLI.

[1]: 8c9ad7b818/api/client/cp.go (L345-L346)
[moby@1b2b91b]: 1b2b91ba43

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/command/container/cp.go

@@ -398,8 +398,7 @@ func copyToContainer(ctx context.Context, dockerCLI command.Cli, copyConfig cpCo
 	}
 
 	options := container.CopyToContainerOptions{
-		AllowOverwriteDirWithFile: false,
-		CopyUIDGID:                copyConfig.copyUIDGID,
+		CopyUIDGID: copyConfig.copyUIDGID,
 	}
 
 	if copyConfig.quiet {